When you're on a VersaClimber, you stand upright and hold onto the handles, while pushing the pedals with your feet. The machine only moves as fast as you do, so you set your own pace.

Versaclimber

The idea is to do a mix of short and long strokes and adjust the range and speed of each stride. While one leg steps, the arm reaches out — it is a push and pull move.

You can even target different parts of the body by isolating the workout to just your arms or legs.

The machine forces you to use both your lower and upper muscle groups, without putting pressure on your joints.

The machine has a monitor to track your heart rate and the amount of calories you are burning. According to Jason Walsh, the founder of Rise Nation, a workout studio that uses VersaClimbers in West Hollywood, you burn between 600-800 calories in 30 minutes.

LeBron James swears by the machine. In fact, he told ESPN: "If I could only have one piece of equipment to train with for the rest of my life this would be it." He has three machines in his houses across the country, according to ESPN.

Lady Gaga uses the machine to get herself fit for concerts. "I work out a lot, and I do VersaClimbing while I sing," Gaga told "Good Morning America." Gaga claims she also sings her entire show while she is exercising on the machine.